318075581149 has 2 divisors, whose sum is σ = 318075581150. Its totient is φ = 318075581148.

The previous prime is 318075581147. The next prime is 318075581167. The reversal of 318075581149 is 941185570813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316665052900 + 1410528249 = 562730^2 + 37557^2 .

It is a cyclic number.

It is not a de Polignac number, because 318075581149 - 2¹ = 318075581147 is a prime.

Together with 318075581147, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 318075581096 and 318075581105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (318075581143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159037790574 + 159037790575.

It is an arithmetic number, because the mean of its divisors is an integer number (159037790575).

Almost surely, 2^318075581149 is an apocalyptic number.

It is an amenable number.

318075581149 is a deficient number, since it is larger than the sum of its proper divisors (1).

318075581149 is an equidigital number, since it uses as much as digits as its factorization.

318075581149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 318075581149 in words is "three hundred eighteen billion, seventy-five million, five hundred eighty-one thousand, one hundred forty-nine".